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五、三向类网架-平板组合结构的简化计算 三角锥网架、抽空三角锥网架及六角锥网架均属上弦是三向的、且组成正三角形网格的三向类网架。三向类网架-平板组合结构的面板,可由预制的正三角形平面的带肋板装配而成(图8a)。分析时可把带肋板的平板部分,折算成三组平面交叉杆系(图8b),并可取出图8b中虚线所示的矩形单元,按上述类似方法确定等代杆系的刚度。但不难发现,这里完全可以应用上节分析中所得到的结果。
5. Simplified calculation of three-dimensional network rack-plate composite structure The triangular cone network frame, the pumping triangle cone network frame and the hexagonal cone network frame are all three-way, three-dimensional network frames that form a regular triangle mesh. The panel of the three-way grid-plate composite structure can be assembled from a pre-fabricated rib plate with an equilateral triangle (Fig. 8a). During analysis, the ribbed plate portion can be converted into three groups of plane crossbars (Fig. 8b), and the rectangular unit indicated by the dashed line in Fig. 8b can be taken out, and the rigidity of the equal generation bar system can be determined in the similar manner as described above. However, it is not difficult to find that the results obtained in the previous section analysis can be fully applied here.